Earring back



FIG. 1 is a front view thereof;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side elevational view;

FIG. 4 is a right side elevational view;

FIG. 5 is a top plan view; and,

FIG. 6 is a bottom plan view.

The front portion of the earring associated with the subject "earringback" is shown in phantom for illustrative purposes only and does notform a part of the claimed design.

The ornamental design for an "earring back", as shown and described.